QA/G-8 provides non-mandatory guidance to assist users in verifying and validating environmental data. The guidance discusses alternative approaches to data validation, including examples of statistics-based validation techniques, and options for verifying that the validated data satisfy relevant claims about their authenticity and quality.

QA/G-5M adapts the current EPA QA/G-5 for modeling projects emphasizing applicable QA Project Plan elements for example, assessment of acquired data and software/hardware configuration testing. Issues such as regulatory task focused systematic planning and the use of the graded approach to match model complexity to the need for evaluation and testing are also addressed.